How to import multiple wadl or xml files to one project at once?

Hello, I have a problem is that how to import multiple wadl or xml files to one project at once?We have soapUI Pro, but none of our developers or testers have found an option to import several wadl or xml files to project at once, nor have i found anything useful on forums/net. Since we are dealing with quite a lot of services and these are often versioned, only so far found possibility is to either update wadl definition one by one, ar start a new project completely and import them(again one by one). Is there any way to import several wadls?